Edit: I discovered the issue must be with the mirror. I downloaded from imgburn.com (in the mirror list) and am now using this awesome simple tool successfully. My rant below was not for the fault of the ImgBurn developer as I originally thought, but the fault of a sneaky mirror host.
I have used ImgBurn for years and love it. Today I would recommend nobody try to install it because the installer I got from a link from ImgBurn.com mutilated my brand new PC. I specifically declined third party installs but that was not respected by the installer, and after I finally got rid of the malware using Malwarebytes Internet explorer was left in an unworking state (I can ping using cmd just fine). I cannot download anything to fix my PC and of course since it's brand new I haven't downloaded any other browsers.
Shame on you, developing fine software only to eventually use it to deliver malware. Unfortunately having once remembered ImgBurn as a go-to utility I will now remember it as a scar.